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Finding the Fourth Proportional to 612,612.72, 918,967.68 and 191,887.38

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Solution

The fourth proportional to 612,612.72, 918,967.68 and 191,887.38 is: 287,846.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,612.72 : 918,967.68 = 191,887.38 : x
  2. Step 2: Convert to fraction form
    612,612.72/918,967.68 = 191,887.38/x
  3. Step 3: Cross multiply
    612,612.72x = 918,967.68 × 191,887.38
  4. Step 4: Simplify right side
    612,612.72x = 176,338,300,419.88
  5. Step 5: Solve for x
    x = 176,338,300,419.88/612,612.72
  6. Step 6: Final answer
    x = 287,846.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.